Welding-tool.



PATENTED MAY 3, 1904.

F. F. THUL.

WELDING TOOL.

APPLICATION FILED MAB. 4, 1903.

2 SHEETS-SHEET 1.

110 MODEL.

No. 758,797. PATENTED MAY 3, 1904.

F. F. THUL.

WELDING TOOL.

APPLICATION FILED MAE 4, 1903.

N0 MODEL. 2 SHEETS-SHEET 2.

NITED STATES Patented May 3, 1904.

PATENT OFFICE.

WELDING-TOOL.

SPECIFICATION forming part 01 Letters Patent No. 758,797, dated May 3,1904.

Application filed March 4,1903. Serial No. 146,100- (No model.)

T (11/ who/'11 it may con/warn.-

Be it known that I, Fmcnnmox F. Tune, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful \Velding- Tool, of which the following is aspecification.

Hy invention relates to improvements in welding-tools which are used inconnection with steam hammers or other mechanism where the necessaryblow can be obtained; and it consists of a tool having a lowerstationary head and an upper movable head, the upper head being guidedin its movement by pins or rods secured in the lower head and heldnormally at some distance above the lower head by springs or somesimilar devices. Each of the said heads is provided with means forattaching thereto one of a pair of cooperating dies or molds.

The object of my improvement is to provide a tool which will hold twocooperating dies or molds normally apart a sufficient distance to enablethe introduction of heated work between them and at the same time guidethe dies in their movement to have them meet properly and accuratelywhen suddenly forced together. I attain these objects by the mechanismillustrated in theaccompanying drawings, in which- Figure 1 is aperspective view of an ordinary steam-hammer, showing my invention inconnection therewith. Fig. 2 is a plan view of the welding-tool removedfrom the steam-immmer. Fig. 3 is a front elevation of the same. Fig. AIis a section on 4 I of Fig. 2. Fig. 5 is a section on 5 5 of Fig. 3.Fig. 6 is a bottom plan of an uper die. Fig. 7 is a top plan of a lowerdie to cooperate therewith, and Fig. 8 is a perspective of a weldedconnection formed by the dies shown in Figs. 6 and 7.

Similar reference characters refer to identical parts throughout theseveral views.

I have shown my device in connection with a steam-hammer 10, but it canbe used with any suitable machine or device.

11 is the upper movable hammer-head, and 12 is the stationary anvil.

Referring to the welding-tool proper, 13 is the lower stationary head,having the side down\vardly-projecting flanges 14, the pin 15 extendinga short distance down from its under face and the four pins 16 extendingupward from its upper face. This lower head 13 also has in its upperface the dovetailed recess 17 and a pin 18, extending upward from itsflat face. The upper movable head 19 is provided with the four holes 20,through which the pins 16 pass. The head 19 has on its upper side thestriking extension 21 and in the lower side the dovetailed recess 22,which corresponds to the recess 17 in the head 13. A pin 22 projectsdownward from the face of the recess 22. The coil expandingsprings 23are interposed between the heads 13 and 19, preferably around the pins16, to keep the upper head 19 normally some distance from the head 13.The pins 16 are provided with heads 2a to prevent the head 19 beingraised too high.

The device which has thus far been described substantially constitutesmy invention; but to more clearly show the object and operation of thesame I hzwe shown a set of dies in connection therewith and willdescribe the operation of my device with the dies and the product ofthose particular dies. It is understood that the dies are removable, andany shape or form of dies may be used. The lower die 25 is secured tothe lower stationary head 13, preferably by a key 26 in the recess 17,the pin 18 registering with the recess 27 in the lower side of the dieThe die 25 has on its upper side the recessed matrix or mold 28. Theupper die 29 is secured to the upper movable head 19, preferably by akey 30 in the recess 22 the pin 22 registering with the recess 31 in theupper side of the die 29. The die 29 has on its lower surface therecessed matrix or mold 32, made to cooperate with the die 25 to formthe desired welded joint.

In operation my device is used in connection with a steam-hammer of thetype shown by setting the head 13 on the anvil 12 to have the pin 15register with the hole 33 in the top of the anvil 12 and the flanges 14on either side of said anvil. The desired dies are then inserted intothe recesses 17 and 22, being held lirml y by driving the keys 26 and 30into i position. The dies shown in the drawings are ISO for the purposeof welding a round bar to a flat bar, which when complete appears asshown in'Fig. 8. The one end of the round bar and one end of the flatbar are lapped over each other the required distance between the twodies while in the proper heated condition, and the hammer-:head 11 isbrought down upon the head 19 with the necessary force by the operatorto weld the two ends together and at the same time press the weldedjoint into the dies, thus making any desired shape or? weld or evenshape a bar without a weld, the object being to accomplish the operationas speedily as possible. The springs 23 always.- raise the upper diewhen the hammerhead is raised.

I may provide the shearing-blades 34 on the side of the heads 13 and 19,which are arranged to shear off round bars when a blow from thehammer-head is delivered on the movable head 19.

I wish it to be understood that I do not limit myself to the exactconstruction shown any more than is necessary by the prior state of theart.

What I claim, and desire to'secure by Letters Patent, is-

In a welding-tooLa die-holding mechanism comprising two die-holdingblocks, guides for one block secured to the other block and a spring tonormally hold the blocks separated, and means to hold said die-holdingmechanism in proper position, said means comprising two flanges restingagainst the sides of a base and a pin. extending into a hole in saidbase substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRED. F. THUL.

Witnesses:

CHAS. F. THUL, R. J. JAGKER.

